1. Evidence of dentin exposure (gingival recession, loss of enamel)
  2. Sensitivity or pain on tactile examination of suspected teeth
  3. Evaporative stimulus: Suspected tooth is isolated using cotton rolls. If a momentary blast of air from air/water syringe causes sensitivity. It can confirm DH
  4. percussion sensitivity
  5. Pain lingering after the stimulus is removed
  6. Vitality tests to rule out pulpal involvement
  7. Radiographic examination to check for caries, pulpal or periodontal involvement
  8. Signs of fractured, leaky or poor restorative margins.

Reference: Clinical operative dentistry-principles and practice : Ramya Raghu, Raghu Srinivasan

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